Not entirely sure, but this fire aligns with July 4, and has one death:

https://www.wenatcheeworld.com/wildfire/update-numerous-stru...

The biggest forest fire I know of in Southern California this year was caused by a boater using his government mandated safety flares.

If there was not a law regulating the use of these incendiary devices, Santa Rosa may not have burned.

https://en.wikipedia.org/wiki/Santa_Rosa_Island_Fire